Home / 28,657.65-42,996.51-11,139.78

Finding the Fourth Proportional to 28,657.65, 42,996.51 and 11,139.78

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Solution

The fourth proportional to 28,657.65, 42,996.51 and 11,139.78 is: 16,713.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,657.65 : 42,996.51 = 11,139.78 : x
  2. Step 2: Convert to fraction form
    28,657.65/42,996.51 = 11,139.78/x
  3. Step 3: Cross multiply
    28,657.65x = 42,996.51 × 11,139.78
  4. Step 4: Simplify right side
    28,657.65x = 478,971,662.17
  5. Step 5: Solve for x
    x = 478,971,662.17/28,657.65
  6. Step 6: Final answer
    x = 16,713.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.